<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	  <style>
        * {
            padding: 0;
            margin: 0;
        }
        .box {
            width: 100%;
            height: 220px;
            background: rgba(255, 255, 255, 0.6);
            text-align: center;
            padding-top: 80px;
        }
        body {
            background: url(../image/1.jpg) no-repeat;
        }
        img {
            width: 200px;
            cursor: pointer;
        }

    </style>

</head>
<body id="bb">
	  <div class="box">
        <img src="../image/1.jpg" alt=""/>
        <img src="../image/2.jpg" alt=""/>
        <img src="../image/3.jpg" alt=""/>
        <img src="../image/4.jpg" alt=""/>
        <img src="../image/5.jpg" alt=""/>
    </div>

</body>
<script src="../jquery-1.12.4.js"></script>
<script>

$(".box img").on("click",function(){

	$("body").css("background","url("+this.src+")");
})

</script>
</html>